I built something similar to LibHunt without knowing about it. Someone on http://wip.chat pointed it out and I quickly shifted my focus to something else. It just doesn't seem like enough room in that space for two players and you already have the market cornered.
I was Associate Director of Development and I quit. I wanted hands on keyboard again. I was tired of the endless meetings, politics and dealing with the client. I wanted to be a developer again. So I stepped down and went back to development. Best idea ever.